Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1984-08-22
1986-02-18
Williams, Howard S.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
2041579, 20415793, B01J 1912
Patent
active
045712905
ABSTRACT:
A process for the selective oxidation of olefins comprises the steps of forming a suspension of semiconductor powder in a solvent media, adding an olefin to the solvent media in the presence of an oxidant to form a mixture and, photochemically activating the mixture with illumination having an energy at least equal to the band gap of the semiconductor powder wherein the selectivity is controlled by the selection of A, of the solvent and of the oxidant. The process is one carried out at about ambient temperature and with gentle agitation. The semiconductor powder has the general formula A.sub.x B.sub.y C.sub.z where A is selected from Bi, Sn, Pt, Pd, Cu, Fe, W, V, Sb, Mo, Ru or Ag and mixtures thereof; B is Te, Sb, Ti, Cd, Mo, V or W and mixtures thereof; C is O or S; x equals 0 to 5; y equals 1 to 3; and z is a number necessary to satisfy the other elements, and is optionally metallized by an element selected from Pt, Pd, Cu or Ag.
REFERENCES:
patent: 3301905 (1967-01-01), Riemenschneider et al.
patent: 4264421 (1981-04-01), Bard et al.
patent: 4303486 (1981-12-01), Bard et al.
patent: 4383904 (1983-05-01), Shepherd
Brazdil, Jr. James F.
Grasselli Robert K.
Ward Michael D.
Curatolo J. G.
Evans L. W.
The Standard Oil Company (Ohio)
Williams Howard S.
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